1.

When 400 mL of 0.2 N solution of a weak acid is neutralized by a diluate aqueous solution of sodium hydroxide under standard conditions, 4.4kJ of heatis liberated .Therefore, the standard enthalpy of neutralization of this weak acid in Kjeqiv^(-1) is

Answer»

`-11`
`-44`
`-55`
`-22`

Solution :400mL of 0.2 N acid solution produce heat `= 4.4 KJ`
`:. ` 100 ML of 1 MLOF 1N acid solution ( 1g EQ) willproduce heat`=( 4.4)/(400) xx ( 1000) /(0.2) =55kJ`
`i.E.,DeltaH _("neut.") =-55kJ e quiv^(-1)`


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